As discovered in #5605 / D2327, Looter has a missing round
Missing since rP14247 (Looter techs) or rP7322 (Player.AddResources without round).
Reproduce with kushite hero having Looter bonus attacking gathering units.
Replay here
https://code.wildfiregames.com/D2327#97846
See also http://irclogs.wildfiregames.com/2019-09/2019-09-29-QuakeNet-%230ad-dev.log